﻿<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" >
        <title>记号标签mark的简单应用</title>
    </head>
    <body>
        <h3>记号标签mark的简单应用</h3>
        <hr />
        <p>这是一段<mark>文字</mark>内容。</p>
    </body>
</html>